Piston and valve rod packing



(Nor/101161.)

H. WOODRING & N. G. COATS.

. PISTON AND VALVE ROD PACKING.

N0. 259,449. Patented June 13, 1882.

\A/ITNEEEEE lflvg wmg ATENT HENRY WOODRING AND NOYGE O. COATS, OF WAVERLY, IOWA.

PISTON AND VALVE ROD PACKING.

SPECIFICATION formingpart of Letters Patent No. 259,449, dated June 13,1882.

Application filed April 1, 1882.

To all whom t't'may concern Beit known that we, HENRY WOODRING and NoYoE G. COATS, both of Waverly, county of Bremer, State of Iowa, have invented a new and useful Improvement in Piston and Valve Rod Packing, of which the following is aspecification.

The object of this invention is to provide an improved metallic packing that can be more readily and accurately set up to compensate for its wear against a piston or valve stem, whereby tight joints about the said stem may always be maintained.

The invention consists of a packing-rin g having outwardly-beveled ends longitudinally split or divided into two or more bevel-edged sections held andadjustable about the piston or valve stem within a suitable stuffing-box between perforated concave top and bottom sectional plates by means of an adj ustable gland.

Figure l is a vertical sectional elevation of the device in position about a piston rod or stem. Fig. 2 is a cross-section of the same on line 00 :0, Fig. 1, with packing-ring removed. Fig. 3 is a side elevation of a top and bottom plate. Fig. 4. is an elevation of the packingring.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents an improved packing consisting of a rim g or sleeve having its ends outwardly beveled, as shown at a, and longitudinally split or divided, as shown at 1), into two sections, having beveled or lapping edges.

B represents a stuffing-box placed 011 or about a piston-rod, O. Centrally in the bottom of said surfing-box B is ajcentrally-perforated bottom plate, D, having a conical cavity, 0, inlwhichglrests the corresponding beveled lower end of the ring A, which is fitted about the piston-rod 0, while a centrallyperforated top plate, E, having a conical cavity, cl, in its lower face, rests upon the upper beveled end of the said ring A within the stuffing-box B. These plates D E are cut into two or more bevel-edged overlapping sections,

(No model.)

as shown at k k, that they may be expanded under pressure of the gland, and thereby make tightjoints where in contact with the stuffingbox 13. A gland, F, having a flan ge, f, aboutits top, is passed over the piston-rod O, and, rest ing uponthe upper surface of the plate E, is secured on the top of the stuffing-box B by stud bolts and nuts 9 h, respectively. 7

This packing is designed to be placed in position about and in contact with the piston rod 0, with its beveled edges b b slightly over lapping, and with its beveled ends a a but partially entered in the conical cavities of the plates 1) E. The gland F is then set in place, bearing on the plate E, and held with its flange above the top of the stuffing-box B by the bolts and nuts 9 h. As the said ringA wears because of the friction of the rod (3, the nuts h are turned down, thus pressing the-glandv the pressure of the gland F is alike at all points of its interior surface. When desired, we fill up the space between the ring A and the walls of the stufling-box B with hemp or other elastic packing.

We do not confine ourselves to a ring made in but two longitudinal sections, as itis manifest that a ring may be constructed of more than two such sections without departing from our invention.

We are aware that split packin g-rin gs having conical ends fitting into solid rings having conical recesses are not new; and we do not claim such invention, our device being preferable over the same, in not only contracting the split ring having conical ends against the rod, but in also expanding the split rings having conical recesses against the standingbox.

What we claim isthe split ring A and expand both of the split The combination, with the stuffing-box B rings D E, substantially as specified. and the gland F, of the diagonally-split. ring HENRY W'OUDRIN G. A, having both ends conical, and the two split NOYGE G. COATS.

5 ringsD E, each having a conical recess to rc- Witnesses:

ccive the conical ends of the ring A, where- A. TJOOLE, by the pressure of the gland F will contract ISAAC WOODRING. 

